Consolidated Statements of Income - USD ($)	12 Months Ended
	Apr. 30, 2022	Apr. 30, 2021	Apr. 30, 2020
Income Statement [Abstract]
Net sales	$ 1,857,186,000	$ 1,744,014,000	$ 1,650,333,000
Cost of sales and distribution	1,630,742,000	1,421,896,000	1,323,771,000
Gross Profit	226,444,000	322,118,000	326,562,000
Selling and marketing expenses	92,555,000	89,011,000	83,092,000
General and administrative expenses	97,547,000	112,521,000	113,353,000
Restructuring charges, net	183,000	5,848,000	(18,000)
Operating Income	36,159,000	114,738,000	130,135,000
Interest expense, net	10,189,000	23,128,000	29,027,000
Pension settlement, net	68,473,000	0	0
Other expense, net	476,000	10,917,000	2,180,000
Income (Loss) Before Income Taxes	(42,979,000)	80,693,000	98,928,000
Income tax expense (benefit)	(13,257,000)	19,500,000	25,275,000
Net Income (Loss)	$ (29,722,000)	$ 61,193,000	$ 73,653,000
Earnings (loss) per share
Basic (usd per share)	$ (1.79)	$ 3.61	$ 4.36
Diluted (usd per share)	$ (1.79)	$ 3.59	$ 4.34